CN114893908B - Double-temperature cooperative intelligent control steam generator system - Google Patents
Double-temperature cooperative intelligent control steam generator system Download PDFInfo
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- CN114893908B CN114893908B CN202210321393.0A CN202210321393A CN114893908B CN 114893908 B CN114893908 B CN 114893908B CN 202210321393 A CN202210321393 A CN 202210321393A CN 114893908 B CN114893908 B CN 114893908B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000000463 material Substances 0.000 claims abstract description 4
- 238000010438 heat treatment Methods 0.000 claims description 53
- 238000005485 electric heating Methods 0.000 claims description 49
- 239000012530 fluid Substances 0.000 claims description 25
- 238000012546 transfer Methods 0.000 claims description 10
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 238000009825 accumulation Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 19
- 230000001965 increasing effect Effects 0.000 description 14
- 239000002918 waste heat Substances 0.000 description 13
- 230000008859 change Effects 0.000 description 10
- 238000013461 design Methods 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 5
- 238000011144 upstream manufacturing Methods 0.000 description 4
- 239000002699 waste material Substances 0.000 description 3
- 206010063385 Intellectualisation Diseases 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 235000010627 Phaseolus vulgaris Nutrition 0.000 description 1
- 244000046052 Phaseolus vulgaris Species 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 235000008429 bread Nutrition 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000005338 heat storage Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/18—Water-storage heaters
- F24H1/20—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes
- F24H1/201—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes using electric energy supply
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1809—Arrangement or mounting of grates or heating means for water heaters
- F24H9/1818—Arrangement or mounting of electric heating means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
- F24H9/2014—Arrangement or mounting of control or safety devices for water heaters using electrical energy supply
- F24H9/2021—Storage heaters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
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- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention provides a double-temperature cooperative intelligent control hot water boiler system, which comprises a hot water boiler, hot water utilization equipment and a heat accumulator, wherein the hot water utilization equipment is a water heater, hot water enters the water heater and is heated in an indirect heat exchange mode to generate domestic hot water; a first temperature sensor is arranged in the heat accumulator and used for detecting the temperature of a heat accumulating material in the heat accumulator; a second temperature sensor is arranged in the hot water utilization device and is used for detecting the temperature of water in the hot water utilization device; the first temperature sensor and the second temperature sensor are in data connection with the central controller. And the central controller automatically controls the operation of the power circulation device according to the temperatures detected by the first temperature sensor and the second temperature sensor. The invention intelligently controls the circulation of the heat accumulator and the hot water utilization equipment, and improves the generation rate of hot water.
Description
Technical Field
The invention relates to a boiler technology, in particular to a steam utilization device of a heat pipe with a novel structure.
Background
Steam utilizing equipment is mechanical equipment that utilizes the thermal energy of fuel or other energy sources to heat water into steam. The steam utilization equipment has wide application field and is widely applicable to places such as clothing factories, dry cleaners, restaurants, steamed bread shops, canteens, restaurants, factory ores, bean product factories and the like.
The existing steam utilization equipment is mostly heated by adopting fuel gas or fuel oil, and the heating efficiency is low, but the research on the steam utilization equipment utilizing waste heat is not much.
The existing steam generator has low output efficiency and low intelligent degree, and cannot be intelligently controlled according to the needs, so that the steam generator based on the steam waste heat for intelligent control needs to be designed.
The invention improves on the basis of the invention, and provides a steam generator system with a novel structure, which fully utilizes a heat source, reduces energy consumption and realizes intelligent control.
Disclosure of Invention
The invention improves on the basis of the previous invention to solve the problems, and provides a new structure steam utilization device for realizing full utilization of waste heat.
In order to achieve the above object, the technical scheme of the present invention is as follows:
the steam generator system comprises a steam generator, a steam utilization device and a heat accumulator, wherein the steam generator is connected with a steam pipe, the steam pipe comprises a main pipe and an auxiliary pipe, the steam utilization device is arranged on the main pipe, the heat accumulator is arranged on the auxiliary pipe, the main pipe and the auxiliary pipe form a parallel pipeline, steam generated by the steam generator respectively enters the steam utilization device and the heat accumulator of the main pipe and the auxiliary pipe, the steam is heated by heat energy of the steam in the steam utilization device, heat is stored in the heat accumulator, and the steam is converged into a return pipe after heat exchange in the steam utilization device and the heat accumulator and returns to the steam generator through the return pipe;
the steam utilization device is a water heater, and the steam enters the water heater and is heated in an indirect heat exchange mode to generate domestic steam; a first temperature sensor is arranged in the heat accumulator and used for detecting the temperature of a heat accumulating material in the heat accumulator; a second temperature sensor is arranged in the steam utilization device and is used for detecting the temperature of water in the steam utilization device; the first temperature sensor and the second temperature sensor are in data connection with the central controller. And the central controller automatically controls the operation of the power circulation device according to the temperatures detected by the first temperature sensor and the second temperature sensor.
Preferably, if the temperature detected by the first temperature sensor is lower than the temperature detected by the second temperature sensor, the central controller controls the power circulation device to stop operating.
Preferably, if the temperature detected by the first temperature sensor is higher than the temperature detected by the second temperature sensor, the central controller controls the power circulation device to start operating.
Preferably, the power circulation means is a pump. Preferably, the steam generator comprises an electric heating device and a steam drum, the electric heating device is arranged in the steam drum, the steam drum comprises a water inlet pipe and a steam outlet, the electric heating device comprises a first pipe box, a second pipe box and a coil pipe, the coil pipe is communicated with the first pipe box and the second pipe box to form a heating fluid closed cycle, and the electric heater is arranged in the first pipe box; the first pipe box is filled with phase-change fluid; the plurality of coils are one or more, each coil comprises a plurality of circular-arc-shaped tube bundles, the central lines of the plurality of circular-arc-shaped tube bundles are circular arcs taking the first tube box as concentric circles, and the ends of adjacent tube bundles are communicated, so that the ends of the tube bundles form free ends of the tube bundles; the steam drum is characterized in that the steam drum is of a circular section, a plurality of electric heating devices are arranged, one electric heating device is arranged in the center of the steam drum and serves as a central electric heating device, and the other electric heating devices are distributed around the center of the steam drum and serve as peripheral electric heating devices.
Compared with the prior art, the invention has the following advantages:
1. according to the invention, the opening and closing of the third valve and the fourth valve are intelligently controlled through the temperature of the steam pipe, so that when the steam temperature meets the requirement, more heat is stored in the heat accumulator under the condition that the steam quantity generated by the steam utilization equipment is met, and the steam utilization equipment is heated by utilizing the heat stored by the steam waste heat under the condition that the steam waste heat is not generated, so that the actual working requirement of the steam utilization equipment is met. Therefore, the waste heat of the steam can be fully utilized, and the waste of excessive heat is avoided.
2. The invention designs a layout diagram of the electric heating device with a novel structure in the steam drum, which can further improve the heating efficiency.
3. The electric heating device provided by the invention can realize periodic frequent vibration of the elastic coil pipe in the intermittent heating in the period, thereby realizing good descaling and heating effects.
4. The invention increases the heating power and reduces the heating power periodically, so that the heated fluid can generate a continuously variable volume to induce the free end of the coil to vibrate, thereby enhancing heat transfer.
5. According to the invention, through a large number of experiments and numerical simulation, the optimal relation of parameters of the coil pipe is optimized, so that the optimal heating efficiency is realized.
Drawings
Fig. 1 is a schematic view of the structure of the steam generator system of the present invention.
Fig. 2 is a schematic diagram of a control structure of the steam generator system of the present invention.
Fig. 3 is a schematic view of a control structure of the steam generator system of the present invention.
Fig. 4 is a top view of the electric heating device of the present invention.
Fig. 5 is a schematic view of a drum structure.
Detailed Description
The following describes the embodiments of the present invention in detail with reference to the drawings.
Herein, "/" refers to division, "×", "x" refers to multiplication, unless otherwise specified.
The following describes the embodiments of the present invention in detail with reference to the drawings.
An intelligently controlled steam generator system is shown in fig. 1, the system comprises a steam generator 1, a steam utilization device 2 and a heat accumulator 3, the steam generator 1 is connected with a steam pipe 9, the steam pipe 9 comprises a main pipe 91 and a secondary pipe 92, the steam utilization device 2 is arranged on the main pipe 91, the heat accumulator 3 is arranged on the secondary pipe 92, the main pipe 91 and the secondary pipe 92 form a parallel pipeline, and the steam utilization device 2 utilizes steam generated in the steam generator 1. The steam generated by the steam generator 1 enters the steam utilization device 2 and the heat accumulator 3 of the main pipe 2 and the auxiliary pipe 3 respectively, the heat energy of the steam is utilized to heat in the steam utilization device 2, the heat is accumulated in the heat accumulator 3, the steam is converged into the water return pipe after heat exchange in the steam utilization device 2 and the heat accumulator 3, and the steam is returned to the steam generator 1 through the water return pipe.
In the above system, the heat energy of the steam is fully utilized, and the heat accumulator can be utilized to store the surplus heat energy.
Preferably, the present system may be provided with only the steam utilization device 2, without providing a secondary pipe.
Preferably, the steam generator may be a steam generator of steam generated by combustion of fuel. Or can be an electric heating steam generator
As shown in fig. 1, the system comprises a first valve 4 and a second valve 5, a third valve 6 and a fourth valve 7, the third valve 6 is arranged on a steam pipe 9 upstream of the steam utilization device 2 and the heat accumulator 3 for controlling the total steam flow into the steam utilization device 2 and the heat accumulator 3, the fourth valve 7 is arranged on a return pipe 10 downstream of the steam utilization device 2 and the heat accumulator 3, the second valve 5 is arranged at the position of the inlet of the steam utilization device 2 of the main pipe 91 for controlling the flow of steam into the steam utilization device 2, the first valve 4 is arranged at the position of the inlet pipe of the heat accumulator 3 of the secondary pipe 92 for controlling the flow of steam into the heat accumulator 3, and the system further comprises a central controller 11 in data connection with the first valve 4, the second valve 5 and the third valve 6, the fourth valve 7. The central controller controls the opening and closing of the first valve 4, the second valve 5, the third valve 6 and the fourth valve 7 and the opening degree, thereby controlling the steam amount entering the steam utilization device 2 and the heat accumulator 3.
Preferably, as shown in fig. 1-3, the system is further provided with a bypass conduit connected to the steam pipe 9, the location of the connection of the bypass conduit to the steam pipe 9 being upstream of the third valve 6, and the bypass conduit being provided with a fifth valve 8. The fifth valve 8 is in data connection with a central controller 11. The opening and closing of the fifth valve 8 can ensure whether the steam passes through the steam utilization device 2 and the regenerator 3.
Preferably, the fifth valve 8 is opened, and the third valve 6 and the third valve 7 are closed.
Opening and closing of the valve according to the flow of steam
Preferably, a steam flow sensor is provided in the steam pipe 9 upstream of the third valve 6, the steam flow sensor being used to detect whether steam is flowing through the steam pipe. The flow sensor is in data connection with a central controller, and the central controller controls the opening and closing of the third valve 6 and the fourth valve according to data detected by the flow sensor.
When the central controller detects that the steam pipe 9 has steam passing through, for example, when the steam generator is in operation, the central controller controls the third valve 6 and the fourth valve 7 to be in an open state, and the steam can enter the steam utilization device 2 and the heat accumulator 3 and enter the water return pipe after heat exchange is completed. When the central controller detects that the steam pipe 9 does not pass through steam, for example, when the steam generator stops running, the central controller controls the third valve 6 and the fourth valve 7 to be closed, and a circulation pipeline is formed by the pipeline where the steam utilization device 2 and the heat accumulator 3 are positioned. At this time, the steam utilization device 2 is heated by the heat stored in the heat storage 3, and the heat energy of the heat stored is utilized. Through the above-described operation, when there is steam, in the case of satisfying the amount of steam generated by the steam utilization apparatus 2, more heat can be stored in the heat accumulator 3, and in the case of no steam waste heat, the steam utilization apparatus 2 can be heated by using the heat stored by the steam waste heat, so as to satisfy the actual working demand of the steam utilization apparatus 2. Therefore, the waste heat of the steam can be fully utilized, and the waste of excessive heat is avoided.
Preferably, the fifth valve 8 is opened, and the third valve 6 and the third valve 7 are closed.
Preferably, when the steam sensor detects steam, the central controller controls the fifth valve 8 to be closed, and the third valve 6 and the fourth valve 7 to be opened.
Preferably, when the steam sensor detects no steam, the central controller controls the fifth valve 8 to be opened, and the third valve 6 and the fourth valve 7 to be closed.
(II) controlling operation of the closed loop system power plant based on the steam flow
Preferably, the auxiliary pipe 3 is provided with a power circulation device, so that the pipeline where the steam utilization device 2 and the heat accumulator 3 are positioned forms a circulation pipeline through the operation of the power circulation device under the condition of no steam waste heat.
Preferably, the power circulation device is in data connection with a central controller, and the central controller 11 automatically controls the operation of the power circulation device according to the data monitored by the steam pipe flow sensor.
When the central controller detects that the pipeline has steam to pass through, the central controller automatically controls the power circulation device to stop running. When the central controller detects that the pipeline does not pass through steam, the central controller automatically controls the power circulation device to start to operate. By controlling the intelligent operation of the power circulation device, the intelligent control of the operation of the power circulation device can be realized according to actual conditions, and the intellectualization of the system is improved.
Preferably, the power circulation means is a pump.
(III) controlling the operation of the power circulation device according to the double temperature detection
Preferably, the steam utilization device 2 is a water heater, and the steam enters the water heater and is heated by an indirect heat exchange mode to generate domestic steam, such as steam for bath; a first temperature sensor is arranged in the heat accumulator 3 and is used for detecting the temperature of the heat accumulating material in the heat accumulator. A second temperature sensor is arranged in the steam utilization device and is used for detecting the temperature of water in the steam utilization device 2. The first temperature sensor and the second temperature sensor are in data connection with the central controller 11. The central controller 11 automatically controls the operation of the power circulation device according to the temperatures detected by the first temperature sensor and the second temperature sensor.
If the temperature detected by the first temperature sensor is lower than the temperature detected by the second temperature sensor, the central controller 11 controls the steam using device 2 to stop operating. If the temperature detected by the first temperature sensor is higher than the temperature detected by the second temperature sensor, the central controller 11 controls the steam utilization device 2 to start operating.
By controlling the operation of the steam utilizing device 2 by means of the detected temperature, autonomous heating of the steam utilizing device can be achieved. Since it was found during development and experiments that in case the heat of the heat accumulator is gradually used up, it may occur that the temperature of the steam coming out of the heat accumulator is lower than the temperature of the water in the steam utilization device 2, in which case it is not possible to reuse the heat accumulator for heating the steam utilization device, but rather it may result in the heat of the steam utilization device being taken away. Thus, by intelligently controlling the operation of the steam utilizing apparatus 2 according to the detected temperature, the circulation of the heat accumulator 3 and the steam utilizing apparatus 2 is intelligently controlled, and the generation rate of steam is improved.
(IV) controlling the opening degree of the valve according to the inlet steam temperature of the steam utilizing device
Preferably, a third temperature sensor is provided at the location of the steam inlet of the steam utilization device 2 for measuring the temperature of the steam entering the steam utilization device 3. The third temperature sensor is in data connection with the central controller 11, which automatically controls the valve opening of the second valve 5 and the first valve 4 according to the temperature detected by the third temperature sensor.
Preferably, when the temperature measured by the third temperature sensor is lower than a certain temperature, the central controller controls the valve 5 to increase the opening degree, and simultaneously controls the valve 4 to decrease the opening degree so as to increase the flow rate of the steam entering the steam utilization device 2. When the temperature measured by the third temperature sensor is higher than a certain temperature, the central controller controls the valve 5 to reduce the opening degree, and simultaneously controls the valve 4 to increase the opening degree so as to reduce the flow rate of the steam entering the steam utilization device 2.
When the temperature measured by the third temperature sensor is lower than a certain temperature, the heat exchange capacity of the steam utilization device 2 is poor, and normal requirements cannot be met, so that more steam is required to enter the steam utilization device, and heat exchange is performed.
Through the operation, when the steam temperature is high, after the steam generation requirement is met, redundant heat is stored through the heat accumulator, and when the steam temperature is low, more steam can enter the steam utilization equipment to be utilized, so that the steam requirement is ensured, and meanwhile, energy is saved.
(V) controlling the opening and closing of the valve according to the steam temperature
Preferably, a fourth temperature sensor is arranged in the steam pipe 9 upstream of the third valve 6, the fourth temperature sensor being used for detecting the temperature of the steam in the steam pipe. The fourth temperature sensor is in data connection with the central controller, and the central controller controls the opening and closing of the third valve 6 and the fourth valve 7 according to the data detected by the fourth temperature sensor.
When the central controller detects that the temperature of the steam pipe 9 exceeds a certain temperature, for example, the steam generator starts to output high-temperature steam when in operation, the central controller controls the third valve 6 and the fourth valve 7 to be in an open state, and the steam can enter the steam utilization equipment 2 and the heat accumulator 3, and flows back after heat exchange is completed, and returns to the steam generator. When the central controller detects that the steam temperature of the steam pipe 9 is lower than a certain temperature, for example, when the steam generator stops running, the central controller controls the third valve 6 and the fourth valve 7 to be closed, and a circulation pipeline is formed by the pipeline where the steam utilization device 2 and the heat accumulator 3 are positioned. At this time, the steam utilization device 2 is heated by the heat accumulation of the heat accumulator 3, thereby utilizing the heat energy of the heat accumulation. Through the above-described operation, when the steam temperature satisfies the requirement, more heat can be stored in the heat accumulator 3 while the amount of steam generated by the steam utilization device 2 is satisfied, and the steam utilization device 2 can be heated by using the heat stored by the steam waste heat without the steam waste heat, so as to satisfy the actual working requirement of the steam utilization device 2. Therefore, the waste heat of the steam can be fully utilized, and the waste of excessive heat is avoided.
Preferably, when the steam sensor detects that a certain temperature is exceeded, the central controller controls the fifth valve 8 to be closed, and the third valve 6 and the fourth valve 7 to be opened.
Preferably, when the steam sensor detects that the temperature is lower than a certain temperature, the central controller controls the fifth valve 8 to be opened, and the third valve 6 and the fourth valve 7 to be closed.
Sixth, controlling operation of the power circulation device of the closed circulation system according to the steam flow
This embodiment is a modification of the fifth embodiment.
Preferably, the auxiliary pipe 3 is provided with a power circulation device, and when the steam temperature of the pipeline 14 is lower than a certain value, the power circulation device is operated by a pump so that a circulation pipeline is formed by the pipeline where the steam utilization device 2 and the heat accumulator 3 are positioned.
Preferably, the power circulation device is in data connection with a central controller, and the central controller 11 automatically controls the operation of the power circulation device according to the data monitored by the steam pipe sensor.
When the central controller detects that the steam temperature of the pipeline is higher than a certain temperature, the central controller controls the third valve 6 and the fourth valve 7 to be opened, and the automatic control power circulation device is a pump to stop running. Because the steam temperature at this time satisfies the heat exchange requirement, the steam utilization device and the regenerator 3 can be heated with steam. When the central controller detects that the steam temperature of the pipeline is lower than a certain temperature, the central controller controls the third valve 6 and the fourth valve 7 to be closed, and the central controller automatically controls the power circulation device to start running of the pump. Since the steam temperature at this time does not satisfy the heat exchange requirement, it is necessary to heat the steam utilization device using the heat accumulator 3. By controlling the intelligent operation of the power circulation device which is a pump according to the steam temperature, the intelligent control of the power circulation device which is the pump operation can be realized according to the actual situation, and the intellectualization of the system is improved.
When the central controller detects that the steam temperature of the pipeline is higher than a certain temperature, the fifth valve is closed. When the central controller detects that the temperature of the pipeline steam is lower than a certain temperature, the fifth valve is opened.
Seventh, controlling operation of the power circulation device according to the outlet temperature detection of the heat accumulator
Preferably, a first temperature sensor is provided at the outlet of the regenerator 3 for detecting the temperature of the regenerator outlet gas. A second temperature sensor is arranged in the steam utilization device and is used for detecting the temperature of water in the steam utilization device 2. The first temperature sensor and the second temperature sensor are in data connection with the central controller 11. The central controller 11 automatically controls the operation of the power circulation device to be a pump according to the temperatures detected by the first temperature sensor and the second temperature sensor.
If the temperature detected by the first temperature sensor is lower than the temperature detected by the second temperature sensor, the central controller 11 controls the power circulation device to stop the operation of the pump.
Under the condition that the third valve and the fourth valve are closed, the operation of the power circulation device which is a pump is controlled through the detected temperature, and the steam utilization equipment can be automatically heated. Since it was found during development and experiments that in case the heat of the heat accumulator is gradually used up, it may occur that the temperature of the gas coming out of the heat accumulator is lower than the temperature of the water in the steam utilization device 2, in which case it is not possible to reuse the heat accumulator for heating the steam utilization device, but rather it may result in that the heat of the steam utilization device is taken away. Therefore, by intelligently controlling the operation of the power circulation device as a pump according to the detected temperature, the circulation of the heat accumulator 3 and the steam utilization device 2 is intelligently controlled, and the steam generation rate is improved.
A steam generator comprising an electric heating device 21, a steam drum 11, the electric heating device 21 being arranged in the steam drum 11, the steam drum 11 comprising a water inlet pipe 5 and a steam outlet 6. The steam outlet 6 is provided in the upper part of the drum.
Preferably, the drum is of cylindrical configuration.
Fig. 4 shows a top view of the electric heating device 21, as shown in fig. 4, the electric heating device 21 comprises a first pipe box 13, a second pipe box 19 and a coil 12, the coil 12 is communicated with the first pipe box 13 and the second pipe box 19, fluid is circulated in the first pipe box 13, the second pipe box 19 and the coil 12 in a closed mode, an electric heater 24 is arranged in the electric heating device 21, and the electric heater 24 is used for heating the fluid in the electric heating device 21, and then the water in the steam box is heated by the heated fluid.
As shown in fig. 4, an electric heater 24 is provided in the first tube box 13; the first pipe box 13 is filled with phase change fluid; one or more coils 12, each coil 12 comprising a plurality of circular-arc-shaped tube bundles 23, the central lines of the plurality of circular-arc-shaped tube bundles 23 being circular arcs with the first tube boxes 13 as concentric circles, the ends of adjacent tube bundles 23 being in communication, the fluid flowing in series between the first tube boxes 13 and the second tube boxes 19 so that the ends of the tube bundles form tube bundle free ends 14, 15; the fluid is phase-change fluid, vapor and liquid are phase-change liquid, the electric heating device is in data connection with the controller, and the controller controls the heating power of the electric heating device to periodically change along with the change of time.
Preferably, the first and second tube boxes 13 and 19 are disposed along the height direction.
It has been found in research and practice that the heating of the electric heater with sustained power stability results in a fluid formation stability of the internal electric heating device, i.e. no flow or little flow or a steady flow, resulting in a significant reduction in the vibration performance of the coil 12, thereby affecting the descaling and heating efficiency of the coil 12. There is therefore a need for improvements in the above described electrical heating coils as follows.
Preferably, the electric heater is arranged in a plurality of sections along the height direction, each section is independently controlled, and the electric heater is started from the lower end to all sections along the height direction in a half period T/2 along the time change, then is closed from the upper end in a later half period T/2 until the period is ended, and all the sections are closed.
That is, assuming that the electric heater is n-segment, in one period T, one segment is started from the lower end every T/2n time until all segments of T/2 time are started, and then one segment is closed from the upper end every T/2n time until all segments of T time are closed.
Preferably, the heating power is the same for each segment.
The electric heater is started gradually from the lower part to the upper part, so that the fluid at the lower part is fully heated, a good natural convection is formed, the flow of the fluid is further promoted, and the elastic vibration effect is improved. Through the change of the time-variable heating power, fluid can be enabled to be frequently evaporated and expanded and contracted in the elastic tube bundle, so that the elastic tube bundle is continuously driven to vibrate, and heating efficiency and descaling operation can be further realized.
Preferably, the number of the electric heaters 24 is plural, each electric heater 24 has different power, and one or more electric heaters can be combined to form different heating powers, in the upper half period, according to time sequence, the electric heaters are started first, the electric heaters are independently started according to the sequence of increasing the heating powers, then the two electric heaters are started, the two electric heaters are independently started according to the sequence of increasing the heating powers, then the number of the started electric heating devices is gradually increased, and if the number is n, the n electric heaters are independently started according to the sequence of increasing the heating powers; and until all the electric heaters are started finally, the heating power of the electric heating device is ensured to be increased sequentially. In the next half period, firstly, a single electric heater is not started, the single electric heater is not started independently according to the sequence of increasing heating power, then two electric heaters are not started independently according to the sequence of increasing heating power, then the number of the electric heating devices which are not started is gradually increased, and if the number is n, n electric heaters are not started independently according to the sequence of increasing heating power; and ensuring that the heating power of the electric heaters is reduced in sequence until all the electric heaters are not started finally.
For example, the number of the electric heating devices is three, namely a first electric heating device D1, a second electric heating device D2 and a third electric heating device D3, and the heating powers are P1, P2 and P3 respectively, wherein P1< P2< P3, and P1+P2> P3; that is, the sum of the first electric heating device and the second electric heating device is larger than that of the third electric heating device, and the first, the second and the third are sequentially started according to time sequence, the first and the second are added, the first and the third are added, the second and the third are added, then the first and the second are added, and the starting sequence in the next half period is the first, the second, the third, the first and the second, the first and the third are added, and then the first and the second are added.
The electric heater gradually increases and reduces heating power, so that the flow of fluid is further promoted, and the elastic vibration effect is improved. Through the change of the time-variable heating power, fluid can be enabled to be frequently evaporated and expanded and contracted in the elastic tube bundle, so that the elastic tube bundle is continuously driven to vibrate, and heating efficiency and descaling operation can be further realized.
Preferably, the heating power of the electric heating device is linearly increased in the first half period, and the heating power of the electric heating device is linearly decreased in the second half period.
The linear variation of the heating power is achieved by a variation of the input current or voltage.
By arranging a plurality of electric heaters, the starting of the electric heaters with gradually increased number is realized, and the linear change is realized.
Preferably, the period is 50 to 300 minutes, preferably 50 to 80 minutes; the average heating power of the electric heating device is 2000-4000W.
Preferably, the heating power is intermittent heating.
In a period of time T, the change rule of the heating power P of the electric heater is as follows:
during the half period of 0-T/2, p=n, where n is a constant value, in watts (W), i.e. the heating power remains constant;
p=0 during half period of T/2-T. I.e. the electric heater does not heat.
T is 50-80 minutes, with 4000W < n <5000W.
By the time-variable heating, fluid can be frequently evaporated and expanded and contracted in the elastic tube bundle, so that the elastic tube bundle is continuously driven to vibrate, and heating efficiency and descaling operation can be further realized.
Preferably, the electric heaters 24 are provided in a plurality, each of which is independently controlled, and the number of electric heaters activated periodically varies with time.
Preferably, the number of the electric heaters is n, and then in a period T, one electric heater is started every T/2n time until the heater is fully started at the T/2 time, and then one electric heater is turned off every T/2n time until the heater is fully turned off at the T time.
Preferably, the heating power of each electric heater is the same.
By the time-variable heating, fluid can be frequently evaporated and expanded and contracted in the elastic tube bundle, so that the elastic tube bundle is continuously driven to vibrate, and heating efficiency and descaling operation can be further realized.
Preferably, the pipe diameter of the first pipe box 13 is smaller than that of the second pipe box 19, and the pipe diameter of the first pipe box 13 is 0.5-0.8 times that of the second pipe box 19. Through the pipe diameter change of the first pipe box and the second pipe box, the fluid can be guaranteed to be subjected to phase change in the first box, the time is short, the fluid can quickly enter the coil pipe, and the fluid can fully enter the second box for heat exchange.
Preferably, the coil is connected at a location 20 of the first tube box that is lower than the location of the second tube box that is connected to the coil. This ensures that steam can quickly pass upwards into the second tube box.
Preferably, return pipes are arranged at the bottoms of the first pipe box and the second pipe box, so that condensed fluid in the second pipe box can enter the first pipeline.
Preferably, the first pipe box and the second pipe box are arranged along the height direction, the plurality of coils are arranged along the height direction of the first pipe box, and the pipe diameter of the coils is continuously reduced from top to bottom.
Preferably, the diameter of the coil is continuously reduced in the top-down direction of the first tube box.
Through the pipe diameter amplitude increase of the coil pipe, more steam can be guaranteed to enter the second box body through the upper portion, distribution of steam in all the coil pipes is guaranteed to be uniform, heat transfer effect is further enhanced, overall vibration effect is uniform, heat transfer effect is increased, and heat transfer effect and descaling effect are further improved. Experiments show that better heat exchange effect and descaling effect can be obtained by adopting the structural design.
Preferably, the number of the coils is plural along the height direction of the first pipe box, and the distance between the adjacent coils is increased continuously from the top to the bottom.
Preferably, the spacing between coils is increased in the height direction of the first tube box.
Through the interval range increase of coil pipe, can guarantee that more steam gets into the second box through upper portion, guarantee that the distribution of steam is even in all coil pipes, further strengthen heat transfer effect for whole vibration effect is even, and the heat transfer effect increases, further improves heat transfer effect and scale removal effect. Experiments show that better heat exchange effect and descaling effect can be obtained by adopting the structural design.
Preferably, the steam drum is a steam drum with a circular cross section, and a plurality of electric heating devices are arranged in the steam drum.
Preferably, one of the plurality of electric heating devices arranged in the steam drum is arranged at the center of the steam drum and becomes a central electric heating device, and the other electric heating devices are distributed around the center of the steam drum and become peripheral electric heating devices. Through such structural design, can make the interior fluid of steam pocket fully reach the vibration purpose, improve the heat transfer effect.
Preferably, the heating power of the individual peripheral electrical heating means is smaller than the heating power of the central electrical heating means. Through the design, the center reaches larger vibration frequency, and a center vibration source is formed, so that the periphery is influenced, and better heat transfer enhancement and scale removal effects are achieved.
Further preferably, the electric heater is an electric heating rod.
Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention, and the scope of the invention should be assessed accordingly to that of the appended claims.
Claims (4)
1. The utility model provides a steam generator system of intelligent accuse is cooperated to two temperatures, includes steam generator, steam utilization equipment and heat accumulator, steam generator connects the steam pipe, the steam pipe includes main pipe and accessory pipe, steam utilization equipment sets up on the main pipe, the heat accumulator sets up on the accessory pipe, main pipe and accessory pipe form the parallel pipeline, steam that steam generator produced gets into steam utilization equipment and the heat accumulator of main pipe and accessory pipe respectively, utilizes the heat energy heating of steam in the steam utilization equipment, carries out the heat accumulation in the heat accumulator, and steam is again conflux and gets into the wet return after heat transfer in steam utilization equipment and the heat accumulator, returns to steam generator through the wet return;
the steam utilization device is characterized in that the steam utilization device is a water heater, and the steam enters the water heater and is heated in an indirect heat exchange mode to generate hot water; a first temperature sensor is arranged in the heat accumulator and used for detecting the temperature of a heat accumulating material in the heat accumulator; a second temperature sensor is arranged in the steam utilization device and is used for detecting the temperature of water in the steam utilization device; the first temperature sensor and the second temperature sensor are in data connection with a central controller, and the central controller automatically controls the operation of the power circulation device according to the temperatures detected by the first temperature sensor and the second temperature sensor; the steam generator comprises an electric heating device and a steam drum, wherein the electric heating device is arranged in the steam drum, the steam drum comprises a water inlet pipe and a steam outlet, the electric heating device comprises a first pipe box, a second pipe box and a coil pipe, the coil pipe is communicated with the first pipe box and the second pipe box to form heating fluid closed circulation, and the electric heater is arranged in the first pipe box; the first pipe box is filled with phase-change fluid; the plurality of coils are one or more, each coil comprises a plurality of circular-arc-shaped tube bundles, the central lines of the plurality of circular-arc-shaped tube bundles are circular arcs taking the first tube box as concentric circles, and the ends of adjacent tube bundles are communicated, so that the ends of the tube bundles form free ends of the tube bundles; the steam drum is of a circular section, a plurality of electric heating devices are arranged at the center of the steam drum to form a central electric heating device, and other electric heating devices are distributed around the center of the steam drum to form peripheral electric heating devices; the heating power of the single peripheral electric heating device is smaller than the heating power of the central electric heating device.
2. The steam generator system of claim 1, wherein the central controller controls the power cycle to cease operation if the temperature sensed by the first temperature sensor is less than the temperature sensed by the second temperature sensor.
3. The steam generator system of claim 2, wherein the central controller controls the power cycle apparatus to begin operation if the temperature sensed by the first temperature sensor is greater than the temperature sensed by the second temperature sensor.
4. The steam generator system of claim 2, wherein the power cycle means is a pump.
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| CN202210321393.0A CN114893908B (en) | 2019-08-13 | 2019-08-13 | Double-temperature cooperative intelligent control steam generator system |
| CN201910739117.4A CN112393217B (en) | 2019-08-13 | 2019-08-13 | Steam generator system of steam flow intelligent control driving device |
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| CN114893907B (en) | 2023-05-26 |
| CN112393217A (en) | 2021-02-23 |
| CN114893908A (en) | 2022-08-12 |
| CN114893907A (en) | 2022-08-12 |
| CN112393217B (en) | 2022-05-17 |
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